Bomb Disposal Cadre (BDC) Constable (Sindh Police) Head Constable Mathematics MCQs Police Department Sindh Police Department STS SIBA Past Papers

In a group of 30 students, 12 like math, 15 like science and 6 like both. How many students like neither subject?

  • 3
  • 9
  • 12
  • 15
  • b
  • Total Students = 30
    Math = 12
    Science=15
    Both =6
    Total=12+15-6=21
    Total Students who like neither=Total Students-Total who like either
    Total Students who like neither=30-21=9

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Bomb Disposal Cadre (BDC) Constable (Sindh Police) Head Constable Mathematics MCQs Police Department Sindh Police Department STS SIBA Past Papers

Riaz’s age after 15 years will be 5 times his age five times back, what the present age of Riaz?

  • 10
  • 20
  • 30
  • 40
  • a
  • Suppose the age of Riz= X
    Riaz Age after 15 Years will be 5 times his age 5 years back= X + 15 = 5 (x-5)
    X+15 = 5 (x-5)
    X+15 = 5X -25
    X+15 +25=5X
    5X – X =40
    4X = 40
    X=40/4
    X=10

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